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binder: Make transaction_log available in binderfs

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Currently, the binder transaction log files 'transaction_log'
and 'failed_transaction_log' live in debugfs at the following locations:

/sys/kernel/debug/binder/failed_transaction_log
/sys/kernel/debug/binder/transaction_log

This patch makes these files also available in a binderfs instance
mounted with the mount option "stats=global".
It does not affect the presence of these files in debugfs.
If a binderfs instance is mounted at path /dev/binderfs, the location of
these files will be as follows:

/dev/binderfs/binder_logs/failed_transaction_log
/dev/binderfs/binder_logs/transaction_log

This change provides an alternate option to access these files when
debugfs is not mounted.

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Link: https://lore.kernel.org/r/20190903161655.107408-4-hridya@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hridya Valsaraju 2019-09-03 09:16:54 -07:00 • committed by Greg Kroah-Hartman
parent 0e13e452da
commit 03e2e07e38
3 changed files with 53 additions and 29 deletions
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34
drivers/android/binder.c
View file

@ -196,30 +196,8 @@ static inline void binder_stats_created(enum binder_stat_types type)
atomic_inc(&binder_stats.obj_created[type]); atomic_inc(&binder_stats.obj_created[type]);
} }
struct binder_transaction_log_entry { struct binder_transaction_log binder_transaction_log;
int debug_id; struct binder_transaction_log binder_transaction_log_failed;
int debug_id_done;
int call_type;
int from_proc;
int from_thread;
int target_handle;
int to_proc;
int to_thread;
int to_node;
int data_size;
int offsets_size;
int return_error_line;
uint32_t return_error;
uint32_t return_error_param;
const char *context_name;
};
struct binder_transaction_log {
atomic_t cur;
bool full;
struct binder_transaction_log_entry entry[32];
};
static struct binder_transaction_log binder_transaction_log;
static struct binder_transaction_log binder_transaction_log_failed;
static struct binder_transaction_log_entry *binder_transaction_log_add( static struct binder_transaction_log_entry *binder_transaction_log_add(
struct binder_transaction_log *log) struct binder_transaction_log *log)
@ -6018,7 +5996,7 @@ static void print_binder_transaction_log_entry(struct seq_file *m,
"\n" : " (incomplete)\n"); "\n" : " (incomplete)\n");
} }
static int transaction_log_show(struct seq_file *m, void *unused) int binder_transaction_log_show(struct seq_file *m, void *unused)
{ {
struct binder_transaction_log *log = m->private; struct binder_transaction_log *log = m->private;
unsigned int log_cur = atomic_read(&log->cur); unsigned int log_cur = atomic_read(&log->cur);
@ -6050,8 +6028,6 @@ const struct file_operations binder_fops = {
.release = binder_release, .release = binder_release,
}; };
DEFINE_SHOW_ATTRIBUTE(transaction_log);
static int __init init_binder_device(const char *name) static int __init init_binder_device(const char *name)
{ {
int ret; int ret;
@ -6120,12 +6096,12 @@ static int __init binder_init(void)
0444, 0444,
binder_debugfs_dir_entry_root, binder_debugfs_dir_entry_root,
&binder_transaction_log, &binder_transaction_log,
&transaction_log_fops); &binder_transaction_log_fops);
debugfs_create_file("failed_transaction_log", debugfs_create_file("failed_transaction_log",
0444, 0444,
binder_debugfs_dir_entry_root, binder_debugfs_dir_entry_root,
&binder_transaction_log_failed, &binder_transaction_log_failed,
&transaction_log_fops); &binder_transaction_log_fops);
} }
if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) && if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) &&

30
drivers/android/binder_internal.h
View file

@ -65,4 +65,34 @@ DEFINE_SHOW_ATTRIBUTE(binder_state);
int binder_transactions_show(struct seq_file *m, void *unused); int binder_transactions_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_transactions); DEFINE_SHOW_ATTRIBUTE(binder_transactions);
int binder_transaction_log_show(struct seq_file *m, void *unused);
DEFINE_SHOW_ATTRIBUTE(binder_transaction_log);
struct binder_transaction_log_entry {
int debug_id;
int debug_id_done;
int call_type;
int from_proc;
int from_thread;
int target_handle;
int to_proc;
int to_thread;
int to_node;
int data_size;
int offsets_size;
int return_error_line;
uint32_t return_error;
uint32_t return_error_param;
const char *context_name;
};
struct binder_transaction_log {
atomic_t cur;
bool full;
struct binder_transaction_log_entry entry[32];
};
extern struct binder_transaction_log binder_transaction_log;
extern struct binder_transaction_log binder_transaction_log_failed;
#endif /* _LINUX_BINDER_INTERNAL_H */ #endif /* _LINUX_BINDER_INTERNAL_H */

18
drivers/android/binderfs.c
View file

@ -630,6 +630,24 @@ static int init_binder_logs(struct super_block *sb)
dentry = binderfs_create_file(binder_logs_root_dir, "transactions", dentry = binderfs_create_file(binder_logs_root_dir, "transactions",
&binder_transactions_fops, NULL); &binder_transactions_fops, NULL);
if (IS_ERR(dentry)) {
ret = PTR_ERR(dentry);
goto out;
}
dentry = binderfs_create_file(binder_logs_root_dir,
"transaction_log",
&binder_transaction_log_fops,
&binder_transaction_log);
if (IS_ERR(dentry)) {
ret = PTR_ERR(dentry);
goto out;
}
dentry = binderfs_create_file(binder_logs_root_dir,
"failed_transaction_log",
&binder_transaction_log_fops,
&binder_transaction_log_failed);
if (IS_ERR(dentry)) if (IS_ERR(dentry))
ret = PTR_ERR(dentry); ret = PTR_ERR(dentry);